KT-6442 Completion of inner class name contains outer name

#KT-6442 Fixed

idea/testData/completion/basic/common/NoNestedClassesFromImplicitQualifier.kt

@@ -8,4 +8,4 @@ fun Outer.foo() {
 }
 
 // ABSENT: Nested
-// ABSENT: Inner
+// EXIST: { itemText: "Inner", tailText: "()", typeText: "Outer.Inner" }

idea/testData/completion/handlers/smart/InnerClassInstantiation1.kt

@@ -0,0 +1,9 @@
+class A {
+    inner class XYZ
+
+    fun foo() {
+        val v: XYZ = <caret>
+    }
+}
+
+// ELEMENT: XYZ

idea/testData/completion/handlers/smart/InnerClassInstantiation1.kt.after

@@ -0,0 +1,9 @@
+class A {
+    inner class XYZ
+
+    fun foo() {
+        val v: XYZ = XYZ()<caret>
+    }
+}
+
+// ELEMENT: XYZ

idea/testData/completion/handlers/smart/InnerClassInstantiation2.kt

@@ -0,0 +1,9 @@
+class A {
+    inner class XYZ
+}
+
+fun A.foo(): A.XYZ {
+    return <caret>
+}
+
+// ELEMENT: XYZ

idea/testData/completion/handlers/smart/InnerClassInstantiation2.kt.after

@@ -0,0 +1,9 @@
+class A {
+    inner class XYZ
+}
+
+fun A.foo(): A.XYZ {
+    return XYZ()<caret>
+}
+
+// ELEMENT: XYZ

idea/testData/completion/smart/NoInnerClassInstantiation.kt

@@ -0,0 +1,11 @@
+class C {
+    inner class Inner
+}
+
+fun foo() : C.Inner {
+    return <caret>
+}
+
+// ABSENT: Inner
+// EXIST: foo
+// NUMBER: 1